﻿/*
 * This file is part of MonoSettlers.
 *
 * Copyright (C) 2010-2011 Christoph Husse
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU Affero General Public License as
 *  published by the Free Software Foundation, either version 3 of the
 *  License, or (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU Affero General Public License for more details.
 *
 *  You should have received a copy of the GNU Affero General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * Authors: 
 *      # Christoph Husse
 * 
 * Also checkout our homepage: http://opensettlers.codeplex.com/
 */
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace MonoSettlers
{
    public class BuildingManager
    {
        public MovableManager MovMgr { get; private set; }

        public BuildingManager(MovableManager inMovMgr)
        {
            if (inMovMgr == null)
                throw new ArgumentNullException();

            MovMgr = inMovMgr;
        }

        public IEnumerable<Point> GetBuildingSpots(Point inAround, Int32 inWidthToCheck, Int32 inHeightToCheck, BuildingConfig inConfig)
        {
            List<Point> result = new List<Point>();

            MovMgr.EnumTerrainAt(inAround, inWidthToCheck, inHeightToCheck, (cell) =>
            {
                Point pos = new Point(cell.X, cell.Y);

                if (CanBuildHere(pos, inConfig))
                    result.Add(pos);

                return true;
            });

            return result;
        }

        public Boolean CanBuildHere(Point inAtCell, BuildingConfig inConfig)
        {
            Boolean result = true;

            return MovMgr.EnumTerrainAt(inAtCell, inConfig.GridWidth, inConfig.GridHeight, (cell) =>
                {
                    do
                    {
                        // TODO: additional checks, like ground type etc.
                        if (cell.WallValue != 0)
                            break;

                        // continue search
                        return true;

                    } while (false);

                    result = false;

                    return false; // abort search
                }) && result;
        }

        public void AddBuilding()
        {

        }

        public void RemoveBuilding()
        {
        }

        public void AddOneCycle()
        {
        }
    }
}
